Carbureter.



LQH. VANBRIGGLE.

. CARBURETER.

APPLICATION FILED JUNE 23. 19I5 Pamned J une 20, 1,916;

bustion engines.

LILBURN'I-IOWARD VAN BRIGGLE, OF INDIANAIOLIS, INDIANA.

CARBURETER.

Specification of Letters Patent. Patentdl Jun@ 2U, 191ML Application filed June 23, 1915. Serial No. 35,759.'

To all Iwhom 4ntag/ concern Be 1t known tha-t I, LILBURN HOWARD -VAN BiiiGoLn, a citizen of the United lStates,

a vertically directed fuel nozzle, and locate this within a Ivertical Venturi tube which is vertically adjustable, and I provide an the center of the upper face of the rib 21 is an lupwardly projecting fuel nozzle 23, which communicates with the fuel passage 22. The upper end of the fuel nozzle 23 is surrounded by the lower end of a Venturi tube 24, which is hung from'its upper end within the tubular stem 15 by a screwthread mounting 25 in the opening between the tubular stem 15 and the transverse passage .11, so that such Venturi tube24 may be vertically adjustedto vary its relationship to ltheend ofthe fuel nozzle 23 to meet the requirement of the particular engine, this adjustment being possible to bring the other end of the Venturi tube either above or be- Vlow the floor of the passage 11. To faciliair supply passageway which passes down,

along the outside of this Venturi tube, around its lower edge, and upward within thc Venturi tube and around the nozzle. By this means, I provide an intimate mixing of the air and fuel. Preferably I also provide a needle which coperates with the upper end of the nozzleso that it will not float on the stream of fuel discharged ytherefrom, thus furt-her promoting the mixing of the fuel 'and-air; and I move this needle against its spring to close the nozzle by a lever which is conveniently operated from the throttle valve so that the needle and the throttle valve are controlled in common.

tate this adjustment the upper end of the Venturi tube 25 is provided with a number of slots 26,. for receiving a lwide screw driver or similar tool to turn the Venturi tube'in its 'screw thread. The upper end ofthe interior of the tubular stem 15, considerably above the lower end of the Venturi Vtube. 24

The single figure of the accompanying -drawing is a vertical section through a car- 12, in which is the usual throttle valve 13,

and at the other is provided with a Aspringclosed auxiliary air valve 14 for opening to admit auxiliary air under high suction in the usual manner. The main body 10 also has a centrally depending tubular stem 15, which' is surrounded by and supports the usual fuel bowl 16, which is held in place on the stem 15 bya screw plug 17 screwed into the bottom of such stem. Within the stem 15 and near the bottom is a cross web 18,`which may be providedl with one or more holes 19 which with a hole 2() inthe plug'l permit the drainage of any fuel which may collect in the stem 15. r1`he web 18 is thickened along one diametrical line by a rib 21,'which is provided with a fuel supply passage 22 communicating with the 1nterior of the fuel bowlv 16; and screwed in just below the screw thread 25. communicates with a prim-'ary air` inlet passage 27,

leading in from the atmosphere. so that in operation this primary air is drawn in to the top of theplug 17through the passage 27, passes downward through such tubular stem 15 along the outside of the Venturi tube 24, is deiiected upward within the Venturi tube 24 by the web 18. and picks up the fuel from the nozzle 23 as it passes upward through such Venturi tube 24 and into the lateral passage 11 at the top of the carbureter body. whence the mixture. augmented by any auxiliarv air supplied by the valve- 14, passes* out through the throttle 13 and out-let opening 12 to the intakemanifold of the engine.

Directly above the screw thread .25 is-a y.the upper portion of such hole being enlarged to receive a compression spring which acts on an enlargement 34 on the needle 32 tending to press such needle'upward, such upward'm'ovement being limited A 'jects on upward through the plug- 35, so that ajoA 'its upperfend may befeng'aged. by an adjust` `ing'serew 36j carr-ied'by-alever 37 which .is l

movable ina lockwise direction-by'an ad. jn'stable circular. cam 38 carried 'by the stein 39 of thethrottle valve 1 -3, andfis spring- 1o.

-' 40 which gis-relativelystrong as compare vwiththe spring ,33. sojasito produce opening and' closi'ng'of f the fuel nozzle corresponding to the. opening and 'closing of the` throttle. The'l spring 33 4tends' to force the needle 32 upwardl so' that such- 'needle does not -flo'aton'the stream of fuel discharged 'ffrom the fuel nozzle.- j

- hethrottle valve is shown' ina substantially closed. position, andthe needle valve nearlyclosed: the amount of opening of the vneedle valve for this. substantially closed position of the throttle 4valve being adjustable by. the' screw 36. On opening the throttle,

25 the cam 38 depresses-the' right hand end of the lever 37-againstf the 'spring 40 so as-to .raisefthe left hand end 'of such lever,',there 'by permittingthe spring 33 to yforce the needle 32 upward.' On olosing'the throttle,

righthand endl of' the lever 37 so as to lower .the left handy end' thereof and forcedown- -ward the.' needle 32 against the 'action 'of' the Sprit .33.' i I c aim as my'invention: l .1, A carbureter, comprising an upwardly directed fuel nozzle, a. Venturitube substantially' coaxial with said fuel nozzle and vertically adjustable. relatively' thereto,l and a tubular stem'su'rrounding and .spaced from said Venturi tube and lprovided with an air inletopeningfabovethe lower end o f said Venturi tube., 'so that the lairwhich enters the Venturi tube must pass downward along 'the outsidev ofsaid'Venturi tube and then upward through the- Venturi tube and Venturi tube and around the nozzle, and` around the nozzle, 'said Venturi tube being adjustable downward so that itsupper end 'is belowthe upper endof said tubular'stem'. 2; A carbureter, comprising an upwardly directed fuel nozzle,- a Venturi ,tube substantially coaxial with' saidffuel nozzle, and -a stationary tubular stem 'surrounding and Ispaced frornsa-id Venturiv tube and provided with an' air inlet opening above the lower end of said Venturi tube,l so that the air which enters the Venturi tubemu'st' pass downward along the outside of said V enturi tube and then upward through' the .a horizontal conduit into which 'at anintermediate pointthereof said. Venturi tube discharges npwardly,'said conduit and said tubular stem being 'relatively fixed and said 6B conduit-having a valved 'air inlet port on the'c'am 38 allows the spring 4'40 to raise the- 'charge port on the other side. of the point where said Venturi tube discharges thereinto. i

v 3. A carburet'er, comprising a'inain body 'having a central'tabular stem discharging at its upper` end into a'substantially horiof' the latter; said horizontal passageway and' said tubular Vstem being relatively' IiXed 'zontal passageway at-an intermediate point pressed in the opposite directlon by. a sprang and said horizontal passageway havinga y -valved air inlet port on one side' of such intermediate point and a valved outletport 0n the otherside of such intermediate point, a `'Venturi tube having a screw-threaded mounting inthe upper end of said central y' tubular stem and having its lower end spaced from the walls of such stem, and an upwardly directed. fuel .nozzle projecting upward' into the lower end o f said .Venturi tube, said central vtubular stem being provided withl an air inlet opening below said screw-threaded.' mounting; 'but' above the4 lowerend of said'Venturi tube.

'4. A carbureter, comprisinga' main .body having a` centraltubular stem discharging lat its upper end into a substantially horizontal passageway at an'i'ntermediate point of the latter, said: horizontal passageway and said tubular stem being relatively fixed.

and said `horizontal passageway having a 4valved. air inletI porton one side of such intermediate point and a valved outlet port on the other side of such intermediate point, a Venturi tube mounted in said central tubular stem .and vertically adjustable rela-A tively to said stem, and an upwardly directed fuel. nozzle projecting into the lower end of said Venturi tube.

5. A carbureter, comprising a main vbody having a central tubular stem discharging at itst upper end into asubstantially horizontal passageway at anfintermediate point of the latter, said horizontal passageway' and said tubular stem .being relatively fixed and said'horizontal passageway'having a-zvalved air inlet' port on one sideof such' intermediate' point and a valvedoutletport on the other slde of such intermediate point, a Venturi tube mounted by its upper endv in said 'central tubular stem and having itslowerend spaced from the walls of'such stem, and-an upwardly directed fuel nozzle projecting upward into the lower end of said Venturi tube, said central tubular stem being provided with van air .inlet opening below the point where said Ven- 'turi tube is mounted 'onl said central tubular stem but above thelower end of Venturi tube.

6'. A carbureter, comprising a .main' body havinga central, vertical, hollow stem and a horizontall passageway .extending across the upperend of said stem and into which! 1,187,945 ygl said stem discharges. said horizontal passageway and said hollow stein being relatively fixed and. said horizontal passagerected fuel nozzle in said stem, a Venturi tube surrounding saidfuel nozzle and vertically adjustable in said hollow stern. and a; removable plug carried by said main body 'above said Venturi tube .so tha't'by its removal access may be had to the Venturi tube for adjusting'it.'

7.' A carbureter, comprising a main body, an upwardly directed fu'el nozzle in said main body, `a Venturi tube surrounding said fuel nozzle, said main lbody having a lhorizontal passageway crossing the upper end of said .Venturi tube andinto which said Venturi tube discharges, said horizontal passageway having an air inletvalve on one side and a throttle valve on the other side of' the vpoint where said Venturi tube discharges thereinto, a needle supported b v said main body above said fuel nozzle and spring-pressed upward, and means for depressing said needle against the action of said spring to close the fuel nozzle.

8. A carbureter, comprising a main 4body having'a central hollow stem, an upwardly directed fuel nozzle in said stem, a removably mounted Venturi tube surrounding said fuel nozzle, said main body having a herizontal passageway crossing the upper end of said Venturi tube and into which saidl Venturi tube discharges, said horizontal passageway and said hollow stem being relatively fixed andy said horizontal `pasaoeway having an air inlet valve on one side and a throttle valve on the other side of the point where said Venturi tube discharges the1eint'o,"and a removable plug Carried by said main body above said Venturitube so that by'its 4removal an opening is provided for inserting and removing the Venturi tube without aii'ectingsaid'air inlet andthrottle valves. y

9. A carbureter, comprising a main body having a central hollow stem, an upwardly directed fuel nozzle in said stem, a Venturi tube surrounding said fuel nozzle, said main body having a horizontal passageway crossing the'upper end of said Venturi tube and into which said Venturi tube discharges, and said horizontal passageway and said tubular stem being relatively fixed and said horizontal passageway havingan air inlet valve on one side and a throttle valve on the other side of the point where said Venturi tube discharges thereinto, and

a removable plug carried by said main body above said Venturi tube so that by its removal access is given both to said horizontal passagev and to said Venturi tube.

10. A carburetor, comprising a main body having a T-shap'ed passage within it, a fuel nozzle and a Venturi tube surrounding said fuel nozzle mounted in the stem of said 'LV-shaped passage, said Venturi tube being' se]" arable from said rnain body said stein having an air inlet opening below saidl fuel nozzle, 'one of thelateral portions of 'said T-shaped passage being provided with an air inlet opening, and a throttle in the other lateral portion of said T-shaped passage.

ln testimony whereof, l have hereunto set in v hand at Indianapolis, Indiana, this 19th dav of June, A. D. one thousandnine hundred and fifteen. 

